package zuoye14;

import java.util.Scanner;

public class zy2 {
       //    已知1英寸(in)=2.54厘米(cm)。输入英寸数，转换成厘米，并输出
       public static void main(String[] args) {
           Scanner s = new Scanner(System.in);
           System.out.println("请输入第一个数");
           int N = s.nextInt();
           double in = 2.54;
           double box = N * in;
           System.out.println(box);
       }
}
